5.0.0 Release Notes

Release contains many breaking changes due to:

  • Dropwizard 2.0 (Jersey 2.26) breaking changes
  • Change of guicey lifecycle

As dropwizard 2.0 already introduce many breaking changes (new jersey actually), so it was an ideal moment to fix all conceptual guicey mistakes.

Please read dropwizard 2.0 upgrade guide first.

Migration Guide.

General changes

Jersey 2.26 introduces an abstraction for injection layer in order to get rid of hk2 direct usage. Right now all direct hk2 classes must be replaced by jersey abstractions (see migration matrix below)

Note that org.glassfish.hk2.api.ServiceLocator must be replaced with org.glassfish.jersey.internal.inject.InjectionManager. The later may be used to obtain locator, but be aware that HK2 supposed to be completely dropped in the next guicey version.

@HK2Managed guicey annotation was renamed to @JerseyManaged to point on possible absence of HK2.

Warning

In the next version guicey will get rid of HK2 and so all HK2-related methods and options were marked as deprecated. There is no alternatives now for deprecated methods so you can continue using them if required. Deprecation simply indicates what will be removed in the future version.

Useless configuration generic was removed from main bundle: GuiceBundle.builder() must be used instead of GuiceBundle.<MyConfg>builder()

GuiceBundle.builder()#useWebInstallers() was removed because WebInstallersBundle is activated by default and so you don't need to activate it manually anymore.

AdminRestBundle was moved from guicey to external module. It is now a guicey bundle. Admin-only resources returns 404 instead of 403 on user context.

Optional extensions

When extension is declared directly in bundle:

.extensions(SimeExtension.class)

And no intaller recognized such extension then startup will fail.

Now extensions can be registered as:

.extensionsOptional(SimeExtension.class)

For optional extension, if installer not found it automatically become disabled.

Note

There is no need to mark extensions as optional for classpath scan or bindigns analysis because guiey will simply not detect extension if requried installer is not available

New guicey lifecycle

Before guicey perform all it's operations under dropwizard run phase. This makes guicey and dropwizard bundles interoperability hard. But guicey should not limit dropwizard abilities and so now almost all configuration is performed under dropwizard's configuration phase.

New guicey lifecycle:

  • Dropwizard bundles are resolved and initialized under configuration phase
  • Classpath scan and extensions resolution appears under configuration phase
  • Guice injector, as before, created under run phase.

GuiceyBundle interface changed from 

public interface GuiceyBundle {
    // called on run phase
    void initialize(GuiceyBootstrap bootstrap);
}

into 

public interface GuiceyBundle {
    // called on configuration phase
    default void initialize(GuiceyBootstrap bootstrap) {}
    // called on run phase
    default void run(GuiceyEnvironment environment) {}
}

Default methods were used by analogy with updated dropwizard ConfiguredBundle to avoid need to always implement both methods.

All registrations, except modules must be performed under configuration phase. On run phase only guice modules could be registered because guice modules often require configuration values (without this it would always require to use root DropwizardAwareModule to perform some modules registrations).

Extensions might be disabled in run phase: assumed that this could be required for optional features, driven by configuration (not needed extensions could be disabled, based on configuration object values).

Note

Dropwizard and guicey bundles are completely equivalent now, but guicey bundles provide more configuration options (aware of guicey). So prefer using GuiceyBundle instead of dropwizard bundles. Note that guicey bundles now provide shortcut methods for easy dropwizard bundles registration.

Before, extensions registration was performed under guice injector creation, but now it was moved just after injector creation in order to differentiate pure injector creation errors from extension installation errors.

Tip

Statistics report (.printDiagnosticInfo()) will also print time by phase: 

GUICEY started in 441.1 ms (104.8 ms config / 336.2 ms run / 0 jersey)
(configuration phase / run phase / extensions installation during jersey startup)

Run phase shortcuts

GuiceyEnvironment don't allow guicey items registrations (except modules), but provide many shortcuts:

  • register() for environment().jersey().register()
  • manage() for environment().lifecycle().manage()
  • listenJetty() for environment().lifecycle().addLifeCycleListener()
  • listenServer() for environment().lifecycle().addServerLifecycleListener()
  • onGuiceyStartup() - special callback called after guicey start to perform manual registrations in dropwizard environment with provided injector
  • onApplicationStartup() - special callback called after complete application startup (in guicey lightweight tests too) (with provided injector)

Multiple bundles and modules of the same type support

Before, guicey was always tracking configuration items by class and so when you register multiple bundles or modules or the same type, only one was accepted: 

.modules(new MyModule1(), new MyModule2())

But often it is required to register multiple modules/bundles with different parametrization:

.modules(new ParametrizableModule("mod1"), new ParametrizableModule("mod2"))

Now guicey allows multiple instances of the same type. So, in examples above, both modules would be registered and used.

Note

Multiple instances support is more logical in context of dropwizard, because dropwizard itself allows registration of multiple bundles of the same type.

Deduplication

In some cases, previous limitation was actually desired for deduplication: before, when two or more bundles use some common bundle, they could safely register it and be sure that only one common bundle instance would be used. Now, both common bundles would be registered.

To workaround such cases deduplication mechanism was introduced: instances of the same type are considered duplicate if they are equal. So, in order to resolve "common bundle problem" bundle must only properly implement equals method, like this:

public class CommonBundle implements GuiceyBundle {
    ...

    @Override
    public boolean equals(final Object obj) {
        return obj != null && getClass().equals(obj.getClass());
    }
}

Tip

Guicey provide base classes for such cases: UniqueGuiceyBundle for unique bundles and UniqueModule (UniqueDropwizardAwareModule) for unique guice modules

But, it may be impossible to implement correct equals method for some 3rd party bundle or module used. In this case unique objects may be marked with:

GuiceBundle.builder()
    .uniqueItems(Some3rdPartyBundle.class, 
                 Some3rdPartyModule.class)

For complex cases (e.g. when only some kinds of objects must be unique), manual deduplication implementation may be registered:

GuiceBundle.builder()
    ...
    .duplicateConfigDetector((List<Object> registered, Object newItem) -> {
         if (newItem isntanceof Some3rdPartyBundle) {
             // decide if item collide with provided registered instances (of the same type)
             return detectedDuplicate // instance that registered is duplicate to or null to accept item
         }           
         // allow instance registration
         return null;    
    })

Detector is called after equals check, so you may be sure that newItem is not equal to any of already registered instances (detector extends default deduplication mechanism, not replaces).

Old "1 instance per class" behaviour could be recovered with bundled detector:

.duplicateConfigDetector(new LegacyModeDuplicatesDetector())

Reporting

Configuration diagnostic report (.printDiagnosticInfo()) was improved to show all registered instances and ignored duplicates.

For example, if we have module declared to be unique by constructor value:

public class VMod extends AbstractModule {

    private int value;

    public VMod(int value) {
        this.value = value;
    }

    @Override
    public boolean equals(Object obj) {
        return obj instanceof VMod && value.equals(obj.value);
    }

}

If modules are registered like this:

 GuiceBundle.builder()
    .modules(new VMod(1), new VMod(1), new VMod(2), new VMod(2))
    .printDiagnosticInfo()
    .build()

Report would contain:

GUICE MODULES =
        VMod                          (com.mycompany) *REG(2/4) 

APPLICATION
    ├── module     VMod                          (com.mycompany)
    ├── module     -VMod                         (com.mycompany) *DUPLICATE
    ├── module     VMod#2                        (com.mycompany)
    ├── module     -VMod#2                       (com.mycompany) *DUPLICATE

Where you can see that 2 of 4 registered modules of type VMod were registered. Note that instances are numbered (#2) in order of registration (without duplicates) so you can always see what bundle were considered as original (and registration order when bundles of the same type are registered in different bundles).

Configuration Model

As before, guicey configuration info (used for it's reports) is available through @Inject GuiceyConfigurationInfo info bean. But in new version it is not class centric: instead new ItemId class used.

ItemId compose item type with real object hash in order to differentiate different instances of type.

// equal classes
ItemId.from(MyType.class).equals(ItemId.from(MyType.class))
// but not equal instances 
!ItemId.from(instance1).equals(ItemId.from(instance2))

But, to simplify checks, instance id is always equal to type id:

ItemId.from(myTypeInstance).equals(ItemId.from(MyType.class))

ItemId's now also used for scopes differentiation (because multiple bundles of the same type could be registered and class is not enough anymore to differentiate scopes).

Some api methods still return lists of classes (for cases when duplicates are not important).

Dropwizard bundles direct support

Dropwizard bundles now could be registered directly with main guice bundle:

 GuiceBundle.builder()
    .dropwizardBundles(new MyDropwizardBundle())

And from guicey bundle:

public void initialize(GuiceyBootstrap bootstrap) {
    bootstrap.dropwizardBundles(new MyDropwizardBundle())
}

Benefits of registration through guicey api:

And that's not all: guicey will also track transitive dropwizard bundles (bundles, installed by registered bundles). That means you can see (in report) and control entire application configuration.

Warning

Only bundles registered with guicey api are tracked. If you don't want some bundle to be tracked register it in dropwizard boostrap object directly (even within guicey bundle bootstrap is available)

This could be useful for deduplication. For example, you have some common dropwizard bundle and two other bundles, registering this common bindle. Normally, you can't use both bundles, because dropwizard will try to install both common bundles. But guicey will deduplicate them.

Note

Transitive dropwizard bundles are tracked by proxying bootstrap object, passed into bundles (not global!).

Transitive dropwizard bundles detection could be disabled with option:

.option(GuieyOptions.TrackDropwizardBundles, false)

In this case only root bundles registered through guicey api would be visible for guicey and so deduplication and disabling will affect only them.

Configuration from guice bindings (jersey1-guice style)

Guicey now can recognize extensions from guice bindings in configured guice modules. For example,

public class MyModule extends AbstractModule {
    public void configure () {
        // right parts just for example 
        bind(MyResource.class).to(MyResourceImpl.class);
        bind(MyManaged.class).toProvider(MyManagedProvider.class);
    }
}

Guicey will detect MyResource as jersey resource and MyManaged as managed extension.

Tip

As with classpath scan, @InvisibleForScanner annotation may be used to prevent binding recognition.

This is completely equivalent to

GuiceBundle.builder()
    .extensions(MyResource.class, MyManaged.class)

Note

Internally, the same installers are used for extensions recognition and installation. The only difference is that guicey would not create default bindings for such extensions (because bindings already exists).

See available restrictions.

Extensions from guice bindings could be also disabled:

.disableExtensions(MyResource.class)

This is possible because guicey use guice SPI to parse configured bindings (before injector creation) and could exclude some bindings before injector startup. If extenions is part of a chain, chain is also removed

Note

To avoid duplicate work by injector (to parse user modules again), guicey prepares synthetic module with pre-processed bindings (and pass it to injector instead of raw modules).

Also, guicey is able to track transitive modules (modules installed by registered modules) and exclude disabled modules.

For example, 

public class MyModule extends AbstractModule {
    public void configure() {
        install(new OtherMyModule());
    }
}  

GuiceBundle.builder()
    .modules(new MyModule())
    .disableModules(OtherMyModule.class)

Will correctly exclude transitive module (including all later transitive modules).

Warning

Deduplication rules will not work with transitive modules: guicey can only detect complete guice modules tree, but not intercept module instance registration. Anyway, be aware that guice itself support deduplication: only one of equal modules will be actually installed.

Guice modules analysis could be disabled with option:

.option(GuiceyOptions.AnalyzeModules, false)

In this case, guicey will work exactly as before: it would only see root modules, configured by user and extensions will not be detected from bindings.

Guice reports

Guice bindings will be shown on diagnostic report .printDiagnosticInfo()

├── GUICE BINDINGS
    │   │
    │   └── BindModule                   (com.mycompany)
    │       └── extension  Ext                          (com.mycompany.ext)

Note

Guice bindings are shown as sub tree because only target extension module class is known whereas multiple modules with the same type could be registered. Extensions are show relative to the top guice module registered by user (because this report just shows "configuration sources")

New guice bindings report .printGuiceBindings():

 1 MODULES with 3 bindings
    │
    └── CasesModule                  (r.v.d.g.d.r.g.support)
        ├── <typelistener>                        CustomTypeListener                              at ru.vyarus.dropwizard.guice.debug.renderer.guice.support.CasesModule.configure(CasesModule.java:19)
        ├── <provisionlistener>                   CustomProvisionListener                         at ru.vyarus.dropwizard.guice.debug.renderer.guice.support.CasesModule.configure(CasesModule.java:26)
        ├── <aop>                                 CustomAop                                       at ru.vyarus.dropwizard.guice.debug.renderer.guice.support.CasesModule.configure(CasesModule.java:33)
        ├── untargetted          [@Singleton]     AopedService                                    at ru.vyarus.dropwizard.guice.debug.renderer.guice.support.CasesModule.configure(CasesModule.java:36) *AOP
        ├── linkedkey            [@Prototype]     BindService                                     at ru.vyarus.dropwizard.guice.debug.renderer.guice.support.CasesModule.configure(CasesModule.java:37) *OVERRIDDEN
        └── instance             [@Singleton]     BindService2                                    at ru.vyarus.dropwizard.guice.debug.renderer.guice.support.CasesModule.configure(CasesModule.java:38) *OVERRIDDEN


    1 OVERRIDING MODULES with 2 bindings
    │
    └── OverrideModule               (r.v.d.g.d.r.g.support)
        ├── linkedkey            [@Prototype]     BindService                                     at ru.vyarus.dropwizard.guice.debug.renderer.guice.support.OverrideModule.configure(OverrideModule.java:16) *OVERRIDE
        └── instance             [@Singleton]     BindService2                                    at ru.vyarus.dropwizard.guice.debug.renderer.guice.support.OverrideModule.configure(OverrideModule.java:17) *OVERRIDE


    1 UNDECLARED bindings
    └── JitService                   (r.v.d.g.d.r.g.s.exts)


    BINDING CHAINS
    └── BindService  --[linked]-->  OverrideService

Shows all bindings in user modules (without overriding modules)

Tip

.printAllGuiceBindings() shows also guicey's own bindings and guice internal bindings. It may be useful to see everything guicey configures.

And new guice aop map report .printGuiceAopMap():

    2 AOP handlers declared
    ├── AopModule/Interceptor1                                                    at ru.vyarus.dropwizard.guice.debug.renderer.guice.support.AopModule.configure(AopModule.java:23)
    └── AopModule/Interceptor2                                                    at ru.vyarus.dropwizard.guice.debug.renderer.guice.support.AopModule.configure(AopModule.java:24)


    1 bindings affected by AOP
    │
    └── Service    (r.v.d.g.d.r.g.s.AopModule)
        ├── something()                                                       Interceptor1
        └── somethingElse(List)                                               Interceptor1

Shows all declared guice aop handlers and how they apply to beans (including order).

Tip

This report is intended to be used as a tool to look some exact beans and methods with .printGuiceAopMap(new GuiceAopConfig().types(...).methods(...))

BindingInstaller

Interface of BindingInstaller was changed from 

public interface BindingInstaller {    
    <T> void bind(Binder binder, Class<? extends T> type);
}

into 

public interface BindingInstaller {
    void bind(Binder binder, Class<?> type, boolean lazy);
    default <T> void manualBinding(Binder binder, Class<T> type, Binding<T> binding){} 
    default void extensionBound(Stage stage, Class<?> type){}
}

Where 

void bind(Binder binder, Class<?> type, boolean lazy);
will be called for classpath scan and directly registered extensions, 

<T> void manualBinding(Binder binder, Class<T> type, Binding<T> binding);

for detected guice bindings and 

void extensionBound(Stage stage, Class<?> type);

in both cases to apply reporting (after bind or manual binding check)

Warning

Binding installers may now be called multiple times in case if guice reports will be activated. If required, actual run could be differentiated from report by current stage currentStage() == Stage.TOOL.

Injector lookup

Injector now could be statically referenced with dropwizard Environment object:

InjectorLookup.getInjector(environment)

Also, direct bean reference added:

MyService service = InjectorLookup.getInstance(application, MyService.class).get()

And with environment:

MyService service = InjectorLookup.getInstance(environment, MyService.class).get()

Guicey listeners changes

Deduplication applied for registered listeners (through .listen()). It is not the same mechanism as applied for extensions. Listeners are registered now in LinkedHashSet and so listeners properly implementing equals and hashcode would be automatically ignored.

Listeners deduplication is useful for reporting: as now all guicey reports implemented with listeners and they correctly implement equals and hashcode so if user by accident register multiple reports they would be printed just once.

Supported events were changed (due to lifecycle changes). More information (configuration objects) added to events.

One special event added ApplicationStarted which is always called after dropwizard startup (including jersey start). It would be fired even in tests when GuiceyAppRule used (which does not start jersey). Supposed to be used to simplify diagnostic reporting.

Listeners are no longer checked to be hooks (for automatic hook registration). This was very confusing feature. Now when hooks are more "open", custom hook should register listener and not opposite.

New shared configuration state

Warning

This feature is intended to be used for very special cases only. It was added to remove current and future hacks for implementing global application state or bundles communication and avoid testing side effects.

Sometimes, it is required to share some "global" state between multiple bundles. In this cases developer have to introduce static or TreadLocal hacks in order to share required state. This usually leads to problems in tests where application instances may run concurrently.

Guicey provides now universal shared state mechanism. It is supposed to be used mainly by bundles. For example, case with one main bundle (which register global scope) and other bundles, appending info into it:

public class MainBundle implements GuiceyBundle {
    @Override
    public void initialize(GuiceyBootstrap bootstrap) {                   
        // make GlobalConfig instance available for other bundles
        bootstrap.shareState(MainBundle.class, new GlobalConfig());
    }
}                                                                

public class RelativeBundle implements GuiceyBundle {
    @Override
    publicvoid initialize(GuiceyBootstrap bootstrap) {                   
        // access global state
        GlobalConfig config = bootstrap.sharedStateOrFail(MainBundle.class, 
                "No global config found, register main bundle");
    }
}

Another example, when equal bundles need to share some context:

public class SomeBundle implements GuiceyBundle {
    @Override
    public void initialize(GuiceyBootstrap bootstrap) {                   
        // either get shared config or register new one (first accessed bundle init state) 
        SharedConfig config = bootstrap
                .sharedState(SomeBundle.class, () -> new SharedConfig());
    }
}

Restrictions:

  • State is accessed by class only to avoid dummy key mistakes. It is advised to use bundle name for key.
  • State can be set only once to avoid hard to track re-assignments. Null not allowed.
  • GuiceyBundle provide state assignment methods only in initialization phase. It is advised to assign values only there to be sure value is available in run phase (avoid errors caused by registration order)

Shared state could be accessed statically anywhere with application instance:

GlobalConfig config = SharedConfigurationState
        .lookupOrFail(application, GlobalBundle.class, "Bundle not registered");

Guicey hooks could also access shared state with callback:

public class XHook implements GuiceyConfigurationHook {
        @Override
        public void configure(GuiceBundle.Builder builder) {
            builder.withSharedState({
                it.put(XHook, "12")
            });
        }
    }

But this is only useful for special states initialization (because bundles are not executed yet).

Note

Guicey itself use this state for Injector storage and in extended bundles ( gsp, spa).

By default, shared state contains references for Bootstrap, Environment, Configuration and ConfigurationTree objects just in case if they'll need to be accessed statically:

Optional<Bootstrap> bootstrap = SharedConfigurationState.lookup(environment, Bootstrap.class);

Reporting changes

All guicey reports were moved into top-level package "debug". All reports are guicey listeners now.

Listeners deduplication mechanism used to ignore duplicate reports activation: e.g. duplicate .printDiagnosticInfo() call will not cause duplicate report render.

Diagnostic report (.printDiagnosticInfo()) is now logged as single log message and not each sub report as separate log.

Statistics sub report now includes guice startup logs (previously required to be activated separately):

    ├── [54%] INJECTOR created in 236.6 ms
    │   ├── Module execution: 143 ms
    │   ├── Interceptors creation: 1 ms
    │   ├── TypeListeners & ProvisionListener creation: 2 ms
    │   ├── Scopes creation: 1 ms
    │   ├── Binding creation: 22 ms
    │   ├── Private environment creation: 1 ms
    │   ├── Binding initialization: 35 ms
    │   ├── Binding indexing: 1 ms
    │   ├── Collecting injection requests: 2 ms
    │   ├── Static validation: 4 ms
    │   ├── Instance member validation: 3 ms
    │   ├── Provider verification: 1 ms
    │   ├── Static member injection: 10 ms
    │   ├── Instance injection: 2 ms
    │   └── Preloading singletons: 6 ms

.printAvailableInstallers() report shows installer markers by implemented interfaces (like TypeInstaller, BindingInstaller, etc.):

INSTALLERS in processing order = 
        OBJECT, ORDER                  lifecycle            (r.v.d.g.m.i.f.LifeCycleInstaller)     
        OBJECT, ORDER                  managed              (r.v.d.g.m.i.feature.ManagedInstaller) 
        OBJECT                         jerseyfeature        (r.v.d.g.m.i.f.j.JerseyFeatureInstaller) 
        JERSEY, BIND, OPTIONS          jerseyprovider       (r.v.d.g.m.i.f.j.p.JerseyProviderInstaller) 
        TYPE, JERSEY, BIND, OPTIONS    resource             (r.v.d.g.m.i.f.j.ResourceInstaller)    
        BIND                           eagersingleton       (r.v.d.g.m.i.f.e.EagerSingletonInstaller) 
        OBJECT                         healthcheck          (r.v.d.g.m.i.f.h.HealthCheckInstaller) 
        OBJECT                         task                 (r.v.d.g.m.i.feature.TaskInstaller)    
        BIND                           plugin               (r.v.d.g.m.i.f.plugin.PluginInstaller) 
        OBJECT, OPTIONS, ORDER         webservlet           (r.v.d.g.m.i.f.w.WebServletInstaller)  
        OBJECT, ORDER                  webfilter            (r.v.d.g.m.i.f.web.WebFilterInstaller) 
        OBJECT, OPTIONS, ORDER         weblistener          (r.v.d.g.m.i.f.w.l.WebListenerInstaller)

If you were using DiagnosticBundle directly it is now ConfigurationDiagnostic listener. DebugGuiceyLifecycle was renamed to LifecycleDiagnostic

Web report

New web report was added to show all registered servlets and filters for both contexts. Report also shows servlets and filters from guice ServletModule:

    MAIN /
    ├── filter     /custom/*                    CustomMappingFilter          (r.v.d.g.d.r.w.s.UserServletsBundle)                    [ERROR]         .custommapping
    ├── filter     /async/*             async   AsyncFilter                  (r.v.d.g.d.r.w.s.UserServletsBundle)                    [REQUEST]       .async
    ├── filter     /both/*                      BothFilter                   (r.v.d.g.d.r.w.s.UserServletsBundle)                    [REQUEST]       .both
    ├── filter     /1/*                         MainFilter                   (r.v.d.g.d.r.w.s.UserServletsBundle)                    [REQUEST]       .main
    ├── filter     /2/*                         --"--                                                                                                
    │   
    ├── filter     /*                   async   GuiceFilter                  (c.g.inject.servlet)                                    [REQUEST]       Guice Filter
    │   ├── guicefilter     /1/*                         GFilter                        r.v.d.g.d.r.w.support.GuiceWebModule
    │   ├── guicefilter     /1/abc?/.*           regex   GRegexFilter                   r.v.d.g.d.r.w.support.GuiceWebModule
    │   ├── guicefilter     /1/foo                       instance of GFilterInstance    r.v.d.g.d.r.w.support.GuiceWebModule
    │   ├── guiceservlet    /2/*                         GServlet                       r.v.d.g.d.r.w.support.GuiceWebModule
    │   ├── guiceservlet    /2/abc?/             regex   GRegexServlet                  r.v.d.g.d.r.w.support.GuiceWebModule
    │   └── guiceservlet    /2/foo                       instance of GServletInstance   r.v.d.g.d.r.w.support.GuiceWebModule
    │   
    ├── filter     /*                   async   AllowedMethodsFilter         (i.d.jersey.filter)                                     [REQUEST]       io.dropwizard.jersey.filter.AllowedMethodsFilter-5d51e129
    ├── filter     /*                   async   ThreadNameFilter             (i.d.servlets)                                          [REQUEST]       io.dropwizard.servlets.ThreadNameFilter-21c815e4
    ...

Jersey report

New jersey report was added to show all jersey extensions (including registered by dropwizard and registered manually):

    ...

    Message body readers
        Object                         BasicTypesMessageProvider    (o.g.j.m.internal)                       [text/plain]
        byte[]                         ByteArrayProvider            (o.g.j.m.internal)                       [application/octet-stream, */*]
        DataSource                     DataSourceProvider           (o.g.j.m.internal)                       [application/octet-stream, */*]
        Document                       DocumentProvider             (o.g.j.jaxb.internal)                    [application/xml, text/xml, */*]
        File                           FileProvider                 (o.g.j.m.internal)                       [application/octet-stream, */*]
        MultivaluedMap<String, String> FormMultivaluedMapProvider   (o.g.j.m.internal)                       [application/x-www-form-urlencoded]
        Form                           FormProvider                 (o.g.j.m.internal)                       [application/x-www-form-urlencoded, */*]
        Type                           GuiceMessageBodyReader       (r.v.d.g.c.h.support)                    
        Type                           HKMessageBodyReader          (r.v.d.g.c.h.s.hk)         *jersey managed 
        InputStream                    InputStreamProvider          (o.g.j.m.internal)                       [application/octet-stream, */*]
        Object                         JacksonJsonProvider          (c.f.j.jaxrs.json)                       [*/*]
        Object                         JacksonMessageBodyProvider   (i.d.jersey.jackson)                     [*/*]
        Reader                         ReaderProvider               (o.g.j.m.internal)                       [text/plain, */*]
        RenderedImage                  RenderedImageProvider        (o.g.j.m.internal)                       [image/*, application/octet-stream]
        StreamSource                   StreamSourceReader           (o.g.j.m.i.SourceProvider)               [application/xml, text/xml, */*]
        SAXSource                      SaxSourceReader              (o.g.j.m.i.SourceProvider)               [application/xml, text/xml, */*]
        DOMSource                      DomSourceReader              (o.g.j.m.i.SourceProvider)               [application/xml, text/xml, */*]
        String                         StringMessageProvider        (o.g.j.m.internal)                       [text/plain, */*]
        T[], Collection<T>             App                          (o.g.j.j.i.XmlCollectionJaxbProvider)    [application/xml]
        T[], Collection<T>             Text                         (o.g.j.j.i.XmlCollectionJaxbProvider)    [text/xml]
        T[], Collection<T>             General                      (o.g.j.j.i.XmlCollectionJaxbProvider)    [*/*]
        JAXBElement<Object>            App                          (o.g.j.j.i.XmlJaxbElementProvider)       [application/xml]
        JAXBElement<Object>            Text                         (o.g.j.j.i.XmlJaxbElementProvider)       [text/xml]
        JAXBElement<Object>            General                      (o.g.j.j.i.XmlJaxbElementProvider)       [*/*,*/*+xml]
        Object                         App                          (o.g.j.j.i.XmlRootElementJaxbProvider)   [application/xml]
        Object                         Text                         (o.g.j.j.i.XmlRootElementJaxbProvider)   [text/xml]
        Object                         General                      (o.g.j.j.i.XmlRootElementJaxbProvider)   [*/*]
        Object                         App                          (o.g.j.j.i.XmlRootObjectJaxbProvider)    [application/xml]
        Object                         Text                         (o.g.j.j.i.XmlRootObjectJaxbProvider)    [text/xml]
        Object                         General                      (o.g.j.j.i.XmlRootObjectJaxbProvider)    [*/*]

    ...

Guicey hooks changes

Guicey lifecycle hooks initially were supposed to be used for testing only. Now they supposed to be also used for pluggable diagnostic tools (bundled, but not active). It could be additional tracing, instrumentation etc.

Hooks supposed to be activated through system property:

-Dguicey.hooks=com.mycompany.MyHook1,com.mycompany.MyHook2

Hook aliases were introduced to simplify activation:

GuiceBindle.builder()
    .hookAlias("alias1", MyHook1.class)

After alias registration, hook(s) could be enabled with alias name instead of full class name:

-Dguicey.hooks=alias1

Also, to make available tools more obvious, all registered aliases are logged at startup:

INFO  [2019-09-16 16:26:35,229] ru.vyarus.dropwizard.guice.hook.ConfigurationHooksSupport: Available hook aliases [ -Dguicey.hooks=alias ]: 

    alias1                    com.mycompany.MyHook1

By default, guicey provide DiagnosticHook which activates guicey's diagnostic reports:

public class DiagnosticHook implements GuiceyConfigurationHook {
    public void configure(final GuiceBundle.Builder builder) {
        builder.printDiagnosticInfo()
                .printLifecyclePhasesDetailed()
                .printCustomConfigurationBindings()
                .printGuiceBindings();
    }
}

It is registered with diagnostic alias and so diagnostic reports may be easily enabled even for compiled application with:

-Dguicey.hooks=diagnostic

Multiple classloaders support

This is very special case, not appearing in usual dropwizard usage.

Before, guicey configuration was based on classes, but if same class come from different classloaders, it would be detected as different extensions.

Now guicey would use class name for extension duplicates detection.

The same for instances (modules, bundles): custom duplicates detector implementation (.duplicateConfigDetector()) will receive objects for test, even if object classes were loaded by different classloaders.

UniqueGuiceyBundle and UniqueModule classes equals and hashcode implementation also check class names to correctly detect different classloaders case.

Bundled reporting listeners still work on class level. Anyway custom listener could always implement equals and hashcode correctly honoring different classloaders case.

Guicey BOM includes guicey itself

Before, when guicey pom was used as bom, it was always required to put guicey version:

dependencyManagement {
    imports.mavenBom 'ru.vyarus:dropwizard-guicey:4.2.2' 
}

dependencies {
    compile 'ru.vyarus:dropwizard-guicey:4.2.2'
}

Now guicey itself is included and only one version declaration required:

dependencyManagement {
    imports.mavenBom 'ru.vyarus:dropwizard-guicey:5.0.0' 
}

dependencies {
    compile 'ru.vyarus:dropwizard-guicey'
}

Warning

Dropwizard bom was split into dropwizard-bom and dropwizard-dependencies so in order to override dropwizard version you will need to provide two dependencies: 

dependencyManagement {
    imports {
        mavenBom 'ru.vyarus:dropwizard-guicey:5.0.0' 
        // override dropwizard version 
        mavenBom 'io.dropwizard:dropwizard-bom:2.0.1'
        mavenBom 'io.dropwizard:dropwizard-dependencies:2.0.1' 
    }
}

Java 11 compatibility

Guicey (and extensions) is binary compatible with java 11. Declared Automatic-Module-Name: dropwizard-guicey.core (META-INF).

Still, guicey releases will be build with java 8, but CI tools will detect any future incompatibilities.

Extension modules

Extension modules version now aligned with guicey version: guiceyVersion-Number. For example, 5.0.0-0 will be the first extensions release for guicey 5.0.0.

All extension bundles are guicey bundles now (thanks to lifecycles unification): SpaBundle, ServerPagesBundle (and relative bundles).

SPA

Package notation may be used for more readable package declaration:

.bundles(SpaBundle.adminApp("admin", "com.mycompany.adminapp", "/manager").build());

BOM

H2 and dropwizard-flyway versions were added to bom.

GSP

To simplify declaration, it is now possible to use package notation to declare resources:

ServerPagesBundle.app("projectName-ui", "com.app.ui", "/")

But old path-style declaration will also work:

ServerPagesBundle.app("projectName-ui", "/com/app/ui/", "/")

View rest mapping now can be declared:

.bundles(ServerPagesBundle.app("projectName-ui", "com.app.ui", "/")
        .mapViews("/view/projectName/ui/")

If mapping not declared then application name will be used as prefix: /projectName-ui (legacy behaviour)

Additional view rest could be also mapped to sub url:

.bundles(ServerPagesBundle.app("projectName-ui", "com.app.ui", "/")
        .mapViews("/sub/path/", "/view/projectOther/ui/")

Additional assets locations could be declared directly:

.bundles(ServerPagesBundle.app("projectName-ui", "com.app.ui", "/")
        .attachAssets("some.other.package")

Assets may also be declared to sub url:

.bundles(ServerPagesBundle.app("projectName-ui", "com.app.ui", "/")
        .attachAssets("/sub/path/", "some.other.package")

ServerPagesBundle lifecycle is more predictable now as all configuration appear under initialization phase and only limited to guicey bundles.

Extension call now also return bundle, which may be used to configure both extra assets and view mappings:

.bundles(ServerPagesBundle.extendApp("projectName-ui")
        .attachAssets("com.otherApp.ui.ext")
        .mapViews("/sub/path/", "/view/projectOther/ui/")
        .build())

Also extension bundle allow delayed configuration under run phase:

.bundles(ServerPagesBundle.extendApp("projectName-ui")
        .delayedConfiguration((env, assets, views) -> {
            if (env.configuration().isExtensionsEnabled()) {
                assets.attach("com.foo.bar")
            }           
         })
        .build())

This might be important if configuration object is required for correct configuration.

Console reporting for GSP application was improved to show all configured mappings (including sub paths).

Removed dynamic rest assignment for direct templates support, now instead of it special ExceptionMapper is used (which removes many problems, appeared with rest approach).

Attention

New recommendation to put all viwe related rest under /view/.. prefix to make it clearly distiguish from application rest.

Note

Just in case if anyone was using PathUtils, they were moved to guicey core with better test coverage and improved api.

JDBI2

JDBI 2 module is deprecated because dropwizard deprecated it'd jdbi bundle and moved to separate repository

Fixes issues

  • #60 Fix configuration bindings for recursive configuration object declarations

Migration guide

Warning

In dropwizard 2.0 @Context fields injection will not work for instances. As guicey register instances, you may be affected. Use Provider<Something> instead or rely on @Context injection for method parameters which is working.

Generic in main bundle:

bootstrap,addBundle(GuiceBundle.<CustomConfiguration>builder()
            ...
            .build())

Must be simply removed: 

bootstrap,addBundle(GuiceBundle.builder()

Jersey abstracted DI code and so most of it's api classes changed. Dropwizard deprecate Bundle interface.

Migration matrix:

Old class New class
org.glassfish.hk2.utilities.binding.AbstractBinder org.glassfish.jersey.internal.inject.AbstractBinder
org.glassfish.hk2.utilities.Binder org.glassfish.jersey.internal.inject.Binder
org.glassfish.hk2.api.Factory java.util.function.Supplier
Factory used for Auth (user provider) java.util.function.Function
org.glassfish.jersey.server.internal.process.AsyncContext org.glassfish.jersey.server.AsyncContext
org.glassfish.jersey.server.internal.inject.AbstractValueFactoryProvider org.glassfish.jersey.server.internal.inject.AbstractValueParamProvider
org.glassfish.jersey.server.spi.internal.ValueFactoryProvider org.glassfish.jersey.server.spi.internal.ValueParamProvider
org.glassfish.hk2.api.InjectionResolver org.glassfish.jersey.internal.inject.InjectionResolver
io.dropwizard.Bundle io.dropwizard.ConfiguredBundle (note that interface methods are default now and may not be implemented)
io.dropwizard.util.Size io.dropwizard.util.DataSize
org.glassfish.hk2.api.ServiceLocator org.glassfish.jersey.internal.inject.InjectionManager
ru.vyarus.dropwizard.guice.module.installer.feature.jersey.HK2Managed ru.vyarus.dropwizard.guice.module.installer.feature.jersey.JerseyManaged

GuiceyBundle

As most of guicey initialization was moved into configuration dropwizard phase, you will have to change all GuiceyBundle's.

It now contains 2 methods (in accordance with dropwizard phases):

  • void initialize(GuiceyBootstrap bootstrap)
  • void run(GuiceyEnvironment environment)

Move all registrations (extensions, modules, bundles) into first method. Guice modules may still be registered in run phase (for simplicity as guicey modules often required configuration values).

Multiple instances registration (bundles, modules)

Warning

This change most likely will be the cause of your app behaviour change. So start investigating from here.

This version accepts registration of multiple instances of bundles and modules of the same type (before only 1 instance of type was allowed).

If you rely on this deduplication behaviour then most likely you will have now duplicate bundle or module registrations.

Important

So if you see very strange behaviour on new version then recover old behavior with: 

GuiceBundle.builder()
    .duplicateConfigDetector(new LegacyModeDuplicatesDetector())
And check again. If weird behaviour disappear then you have duplicate configurations if not - check if it's module analysis issue

In case of problems you can either stay in legacy mode or find the root cause. To find duplicate registrations enable diagnostic reports:

.printDiagnosticInfo()

In configuration summary section pay attention to REG(n/m) markers, like this:

GUICE MODULES =
        VMod                          (com.mycompany) *REG(2/4)

In this example, guice module VMod was registered 4 timed, but only 2 instances were accepted. Most likely in your case numbers would be equal (meaning all instances were used).

Next, look into configuration tree in order to find configuration sources, and look for duplicated item registration. You should see something like:

    APPLICATION
    ├── module     VMod                       (com.mycompany) 
    ...   
    │   
    ├── SomeBundle                 (com.mycompany) 
    │   ├── module     VMod#2                    (com.mycompany)
    ...

After that it should be clear how multiple instances appear.

Possible scenario

As an example of what can happen: if you're using bundles lookup and were assuming before that if bundle will be registered manually - lookup will be simply ignored. But now it's not and multiple bundles will appear.

In order to fix multiple instances, correct equals method must be implemented. Equals logic depends on your needs: you may need always only one instance, like before or just remove instances with duplicate confiurations (with the same constructor parameters).

For "only 1 allowed" case, you can simply use provided UniqueGuiceyBundle or UniqueModule as base classes. For example:

public class VMod extends UiqueModule {...}

or

Or you can simply properly implement equals method. For example, if you want only one instance of some guice module to be used then implement it's equals as 

public class VMod extends AbstractModule {
    ...

    @Override
    public boolean equals(final Object obj) {
        return obj != null && getClass().equals(obj.getClass());
    }
}

And with this change, duplicates will be correctly avoided:

    APPLICATION
    ├── module     VMod                       (com.mycompany) 
    ...   
    │   
    ├── SomeBundle                 (com.mycompany) 
    │   ├── module     -VMod                    (com.mycompany) *DUPLICATE
    ...

3rd party modules (where you can't implement equals method) may be deduplicated with

.uniqueItems(Some3rdPathyModuel.class)

Or (for special cases) completely custom implementation could be provided. E.g. suppose we can't change VMod and add correct equals, then:

.duplicateConfigDetector((List<Object> registered, Object newItem) -> {
     if (newItem isntanceof VMod) {
         // decide if item collide with provided registered instances (of the same type)
         return registered.get(0);
     }           
     // allow instance registration
     return null;    
})

Detector in all cases when another instance of already registered type appear and equals check did not reveal duplicates (custom config called only after check if new item is equal to any of registered items).

Detector receive all accepted instances of this type and new item. It must return either "original item" to mark this new as duplicate for it, or null to allow registration.

Guice bindings analysis

Warning

Another point of potential migration problems

As guicey now analyze bindings from registered guice modules it could detect and install new extensions, declared in bindings. For example,

public void configure() {
    bind(MyResource.class);
}

MyResource will now be recognized and installed as extension (this affects all supported extension types).

Also, .disableExtension() and .disableModule() could now affect internal bindings.

For example, if before some "extension" was detected as bean in guice module (like above) and you have .desableExtensions(MyResource.class) then bindings will disappear now (but before nothing happens).

The same for modules:

public class MyModule extends AbstractModule {
    public void configure() {
        install(new OtherMyModule());
    }
}     

GuiceBundle.builder()
    .disableModules(OtherMyModule.class)

Before, nothing happen and now OtherMyModule would be removed (all bindings of module).

Important

If you have strange behaviour and it's not caused by configuration instances duplicates then it's probably new modules processing. Recover old behaviour with 

.option(GuiceyOptions.AnalyzeModules, false)
And check again. If weird behaviour disappear then you have either new recognized extensions or removed bindings (driven by disabled extensions or modules).

To investigate this problems use .pringGuiceBindings() report (with enabled analysis ofc.). For example:

public class TransitiveModule extends AbstractModule {

    @Override
    protected void configure() {
        bind(Ext1.class);
        bind(Ext2.class);
        install(new InnerModule());
    }

    public static class InnerModule extends AbstractModule {
        @Override
        protected void configure() {
            bind(Ext3.class);
        }
    }
} 

GuiceBundle.builder()                     
    .modules(new TransitiveModule())
    .disableModules(InnerModule.class)
    .disableExtensions(Ext2.class)   
    .pringGuiceBindings()

will report:

2 MODULES with 2 bindings
    │   
    └── TransitiveModule             (com.mycompany)    
        ├── untargetted          [@Prototype]     Ext1                                            at com.mycompany.TransitiveModule.configure(TransitiveModule.java:15) *EXTENSION
        ├── untargetted          [@Prototype]     Ext2                                            at com.mycompany.TransitiveModule.configure(TransitiveModule.java:16) *EXTENSION, REMOVED
        └── InnerModule                   (com.mycompany.TransitiveModule) *REMOVED

InnerModule and all of it's bindings were removed. Ext2 was also removed (as disabled extension).

Or you can see only recognized bindings in configuration tree report .printDiagnosticResport():

GUICE BINDINGS
        │   
        └── TransitiveModule             (com.mycompany)    
            ├── extension  Ext1                         (com.mycompany.TransitiveModule) 
            └── extension  -Ext2                        (com.mycompany.TransitiveModule) *DISABLED

Note

On diagnostic report extensions will appear below the top-level module because this report shows everything registered by user. Detailed location could be viewed in guice report (.printGuiceBindings()).

Test hooks

If you were using guicey hooks for testing, then you will have to rename:

  • GuiceyConfigurationRule into GuiceyHooksRule
  • @UseGuiceyConfiguration (spock extension) into @UseGuiceyHooks

Removed options

GuiceBundle.builder()#useWebInstallers() was removed because WebInstallersBundle is activated by default and so you don't need to activate it anymore.

If you were using GuiceyOptions.ConfigureFromDropwizardBundles then consider using GuiceyBundle now instead of combined dropwizard bundle (as guicey bundle is not limiting replacement now).

If you were using GuiceyOptions.BindConfigurationInterfaces then just annotate configuration interfaces injection points with @Config (interface bindings are qualified).

Reporting

If you were using DiagnosticBundle directly it is now ConfigurationDiagnostic listener.

DebugGuiceyLifecycle was renamed to LifecycleDiagnostic

All reports were moved into top-level package "debug".

You don't need to enable guice statistics (injector creation) logs manually now: they would be intercepted automatically and show under diagnostics stats sub reprot (.printDiagnosticInfo())

Extension modules

SpaBundle and ServerPagesBundle are guicey bundles now, so register them accordingly.

ServerPagesBundle.extendApp is not just a static call anymore: now returned guicey bundle must be also registered. If application is extended in the same bundle with registration (required extenions), it may now be scpecified directly in application builder: ServerPagesBundle.app(...).attachAssets(...)

Installers

If you were writing custom installer, you'll have to update them.

First of all, remove redundant generic on FeatureInstaller interface:

public class MyInstaller implements FeatureInstaller<Something> ...

Must become:

public class MyInstaller implements FeatureInstaller ...

BindingInstaller interface significantly changed due to extensions recognition directly from guice bindings